Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

134. Identify, giving reasons, the faster reaction in the following:

$N_{2} (10 atm) + 3 H_{2} (10 atm) \to 2 {NH}_{3} (g) N_{2} (5 atm) + 3 H_{2} (5 atm) \to 2 {NH}_{3} (g)$

The first reaction will proceed at a fast speed because under high pressure the number of reactant molecules per unit volume are more compared with low pressure. This means that when the pressure is high, the collisions among the reactant molecules are more and as a result, the chemical reaction will be fast compared with low pressure.

131 Views

135. What is the difference between order and molecularity of a reaction?

871 Views

Long Answer Type

136. What are Pseudo chemical reaction? Give examples.

558 Views

Short Answer Type

137. A reaction is first order in A and second order in B.
(i) Write differential rate equation.
(ii) How is the rate affected if the concentration of B is tripled?
(iii) How is the rate affected when the concentrations of both A and B are doubled?
What is the significance of rate constant in the rate expression?

120 Views

138. Following reaction takes place in one step:

2 NO (g) + O_{2} (g) ⇋ 2 {NO}_{2} (g)

How will the rate of the above reaction change if the volume of the reaction vessel is diminished to one third of its original volume? Will there be any change in the order of the reaction with the reduced volume ?

1416 Views

139. Two similar reactions have the same rate constant at 25°C, but at 35°C one of the reaction has a higher rate constant than the other. Account for these observations.

129 Views